Every year, about 100 million Americans get a sunburn, and it's often associated with outdoor activities (as opposed to intentionally trying to get a tan), binge drinking, and using sunless tanning products (your skin is "tanned" and you don't notice the burn that's happening).

If that happens to you year after year, you're at a hugely increased risk of skin cancer.

A study in the American Journal of Lifestyle Medicine found that around one-third of people say they had between one and five sunburns in the past year.

And the American Academy of Dermatology says that if you have just five or more blistering sunburns between the ages of 15 and 20, your risk for developing melanoma — the most serious form of skin cancer — jumps by 80%, and the risk for squamous or basal cell skin cancer goes up by 68%.

That's why Johns Hopkins Medicine recommends you put on sunscreen every morning.

They say it takes an ounce of 30-plus SPF sunscreen (I say micronized zinc sunscreen only, 35 SPF) to protect your face, neck, arms, and legs. To protect just your face and neck, they recommend using half a teaspoon.

And if you're outdoors for extended periods of time and don't think to reapply sunscreen every couple of hours, they recommend a 60 SPF.